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● Describe the following ●

□ Synapsis

□ Bivalent

□ Chiasmata


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Answer 1

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$\Large\red● \green {\fbox\blue {Describe \: the \: following}} \red●$

□ Synapsis

□ Bivalent

□ Chiasmata

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✍︎ Synapsis : It is the pairing of homologous chromosomes at cell division. It occurs in Zygonema.

✍︎ Bivalent : A Bivalent is one pair of chromosomes in a tetrad. A tetrad is the association of a pair of homologous chromosomes physically held together by at least one DNA crossover. This physical attachment allows for alignment and segregation of the homologous chromosomes in the first meiotic division.

✍︎ Chiasma : A Chiasma is the point of contact, the physical link, between two chromatids belonging to homologous chromosomes. At a given chiasma, an exchange of genetic material can occur between both chromatids, what is called a chromosomal crossover, but this is much more frequent during meiosis than mitosis.

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⣿⣿⣿⣿⣿⣿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⢿⣿⣿⣿⣿⣿

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⣿⣿⣿⣿⣧⠀⠀⠀⣠⣾⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⠀⠀⠀⠀⠀⣸⣿⣿⣿⣿

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⣿⣿⣿⣿⣿⣿⣄⠀⣴⣿⠋⠀⠀⠀⠀⠀⣿⠇⠀⠀⠀⠀⠀⢠⣾⣿⣿⣿⣿⣿

⣿⣿⣿⣿⣿⣿⣿⣦⣿⣿⣶⣶⣶⣶⣶⣶⣿⣷⣶⣦⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿

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Answer 2

Answer:

Synapsis : It is the pairing of homologous chromosomes at cell division. It occurs in Zygonema.

✍︎ Bivalent : A Bivalent is one pair of chromosomes in a tetrad. A tetrad is the association of a pair of homologous chromosomes physically held together by at least one DNA crossover. This physical attachment allows for alignment and segregation of the homologous chromosomes in the first meiotic division.

✍︎ Chiasma : A Chiasma is the point of contact, the physical link, between two chromatids belonging to homologous chromosomes. At a given chiasma, an exchange of genetic material can occur between both chromatids, what is called a chromosomal crossover, but this is much more frequent during meiosis than mitosis.